{
  "manageEntity": {
    "action": "Save",
    "entityId": "56979509",
    "entityType": "Track",
    "nonce": "0x0fcdd965fadf7fc7753a2443b34dd08b63a377879f88b0e3340767f0f6675324",
    "signature": "0xd3238390939fa532fe6ad6b4dda6233a7f4b50acf6a637acbb5e69c92dbb3adb06d341ee54da9f630efb17633563acf3f738a390c9f75b81eb30a42a434815291c",
    "signer": "0xaBca4973b8911Fb110a95E6e00e5BBFBCa671473",
    "userId": "832058678"
  }
}